<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>变量</title>
		<script>
			/*var a = 3;
			alert(a);*/
			var num  =2;
			var num2 = 1.3;
			var str = -"1.3";
			document.write(num+"<br>");
			document.write(num2+"<br>");
			document.write((num2===str)+"<br>");
			document.write(typeof(str) + "-----"+str+"<br />")
			
			
		</script>
	</head>
	<body>
	</body>
</html>
